1/*
2 * clock2xxx.c - OMAP2xxx-specific clock integration code
3 *
4 * Copyright (C) 2005-2008 Texas Instruments, Inc.
5 * Copyright (C) 2004-2010 Nokia Corporation
6 *
7 * Contacts:
8 * Richard Woodruff <r-woodruff2@ti.com>
9 * Paul Walmsley
10 *
11 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
12 * Gordon McNutt and RidgeRun, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18#undef DEBUG
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/clk.h>
23#include <linux/io.h>
24
25#include <plat/cpu.h>
26#include <plat/clock.h>
27
28#include "clock.h"
29#include "clock2xxx.h"
30#include "cm.h"
31#include "cm-regbits-24xx.h"
32
33struct clk *vclk, *sclk, *dclk;
34
35/*
36 * Omap24xx specific clock functions
37 */
38
39/*
40 * Set clocks for bypass mode for reboot to work.
41 */
42void omap2xxx_clk_prepare_for_reboot(void)
43{
44	u32 rate;
45
46	if (vclk == NULL || sclk == NULL)
47		return;
48
49	rate = clk_get_rate(sclk);
50	clk_set_rate(vclk, rate);
51}
52
53/*
54 * Switch the MPU rate if specified on cmdline.  We cannot do this
55 * early until cmdline is parsed.  XXX This should be removed from the
56 * clock code and handled by the OPP layer code in the near future.
57 */
58static int __init omap2xxx_clk_arch_init(void)
59{
60	int ret;
61
62	if (!cpu_is_omap24xx())
63		return 0;
64
65	ret = omap2_clk_switch_mpurate_at_boot("virt_prcm_set");
66	if (!ret)
67		omap2_clk_print_new_rates("sys_ck", "dpll_ck", "mpu_ck");
68
69	return ret;
70}
71
72arch_initcall(omap2xxx_clk_arch_init);
73
74
75